1. **Simplify the expression:** $64 - 9\sqrt{4}$.
2. **State the problem:** We need to simplify $64 - 9\sqrt{4}$.
3. **Recall the rule:** The square root of 4 is $\sqrt{4} = 2$.
4. **Substitute and simplify:**
$$64 - 9 \times 2 = 64 - 18$$
5. **Calculate the result:**
$$64 - 18 = 46$$
6. **Final answer:** $46$.
This completes the simplification of the first expression.
Simplify Expression 7D0E7E
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